Friendly and bubbly, Julia Padden likes nearly everyone, but her standoffish neighbor, Cain Maddox, presents a particular challenge. No matter how hard she’s tried to be nice, Cain rudely rebuffs her at every turn, preferring to keep to himself. But when Julia catches Cain stealing her newspaper from the lobby of their apartment building, that’s the last straw. She’s going to break through Cain’s Scrooge-like exterior the only way she knows how: by killing him with kindness.
To track her progress, Julia starts a blog called The Twelve Days of Christmas. Her first attempts to humanize Cain are far from successful. Julia brings him homemade Christmas treats and the disagreeable grinch won’t even accept them. Meanwhile, Julie’s blog becomes an online sensation, as an astonishing number of people start following her adventures. Julia continues to find ways to express kindness and, little by little, chips away at Cain’s gruff façade to reveal the caring man underneath. Unbelievably, Julia feels herself falling for Cain—and she suspects that he may be falling for her as well. But as the popularity of her blog continues to grow, Julia must decide if telling Cain the truth about having chronicled their relationship to the rest of the world is worth risking their chance at love.